| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| John Salathé | 2 | Yosemite big wall pioneer and blacksmith. His hand-forged hard steel - and thus reusable - pitons were the technological breakthrough that enabled long routes to be climbed on the granite walls of Yosemite. |
| John Stainforth | 2 | References[1] https://www.ukclimbing.com/forums/off_belay/john_stainforth-784965 |
| John Yablonski | 2 | Californian activist and free-soloist. Credited with conceptualising Midnight Lightning and an early proponent of the bouldering sit-start. References[1] Portrait by Dean Fidelman, 1978 https://www.instagram.com/p/Bz_TXWJjs6R/ [2] https://www.climbing.com/people/bouldering-sit-start-john-yablonski/ |
| Jonathan Reti | 2 | |
| Jon Clark | 2 | |
| Jordan Shepard | 2 | |
| José Luis Pereyra | 2 | References[1] https://publications.americanalpineclub.org/articles/12200307600/The-Tree-of-Life |
| Josh Cornah | 2 | |
| Josh Muehring | 2 | |
| Jos Leenan | 2 | |
| Jules Littlefair | 2 | |
| Julia Duffy | 2 | |
| Justin Sjong | 2 | |
| Katrin Lehmann | 2 | |
| Katy Forrester | 2 | |
| Keisuke Mizuno | 2 | |
| Keith Darbyshire | 2 | |
| Keith Myhill | 2 | Keith fell of Windy Ledge at Stoney Middleton, and survived! Mick Ward tells the story:
|
| Kim Schmitz | 2 | Yosemite big wall pioneer, Himalayan mountaineer and guide. References[1] https://adventuresportsjournal.com/kim-schmitz-yosemite-climbing-legend/ |
| Kirsten Taylor | 2 |